我使用此代码来 ping 网站 google.com
public String ping(String url) {
String str = "";
try {
Process process = Runtime.getRuntime().exec(
"/system/bin/ping -c 1 " + url);
BufferedReader reader = new BufferedReader(new InputStreamReader(
process.getInputStream()));
int i;
char[] buffer = new char[4096];
StringBuffer output = new StringBuffer();
while ((i = reader.read(buffer)) > 0)
output.append(buffer, 0, i);
reader.close();
// body.append(output.toString()+"\n");
str = output.toString();
Log.d("str", str);
}
catch (IOException e) {
// body.append("Error\n");
e.printStackTrace();
}
return str;
}
log-cat 输出如下所示:
11-12 07:23:34.028: D/str(1399): PING www.google.com (216.58.209.196) 56(84) bytes of data.
11-12 07:23:34.028: D/str(1399): 64 bytes from bud02s22-in-f4.1e100.net (216.58.209.196): icmp_seq=1 ttl=48
**time=149 ms**
11-12 07:23:34.028: D/str(1399): --- www.google.com ping statistics ---
11-12 07:23:34.028: D/str(1399): 1 packets transmitted, 1 received, 0% packet loss, time 0ms
11-12 07:23:34.028: D/str(1399): rtt min/avg/max/mdev = 149.750/149.750/149.750/0.000 ms
有人知道我怎样才能得到“time=149 ms”的值吗? 提前致谢!
最佳答案
您可以使用正则表达式:
/.*time=([0-9]+)\s(ms).*/
你想要的信息在两个捕获组中。我推荐正则表达式的原因是,如果您需要一些其他信息,您可以轻松扩展它。
sed
上面的例子(d
包含你的字符串):
prakhar@inS4n3 /tmp $ cat d| sed -r 's/.*?time=([0-9]+)\s(ms).*/\1 \2/'
149 ms
下面是如何在 java 中使用上面的代码:http://www.tutorialspoint.com/java/java_regular_expressions.htm .
关于android - 我怎样才能得到平的时间?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33666298/